Combined poat and gas range



H. c. MAUL.

COMBINED HCOAL AND GAS RANGE. I APucAnou FILED JAN.21. 1918. 1,306,269; Patented June 10, 1919.

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COMBINED COAL AND GAS RANGE.

APPLICATION FILED JAN-2|. I918.

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, H. C. MAUL. CDM-BINED COAL AND GAS RANGE.

APPLICATION FILED iAN.2I. 1918 1,306,269. Patented June 10, 1919. v

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duo-anew HENRY C. MAUL, 0F DETROIT,

MICHIGAN, ASSIGNOR TO THE MICHIGAN STOVE COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

COMBINED COAL-AND GAS RANGE.

Specification of Letters Patent.

Patented June 10, 1919.

' Application filed January 21, 1918. Serial No. 212,886.

To all whom it may concern: I

Be it known that I,'HENRY C. MAUL, a citizen of the United States of America, residin at Detroit, in the county of Wayne and tate of Michigan, have invented certain new and useful Improvements in Combined Coal and Gas Ranges, of which the following is a specification, reference being had therein to the accompanying drawings. In combining coal and gas ranges, stove manufacturers have found it difficult to satisfactorily eliminate certain objectionable results, which may'have heretofore been considered features of a good stove. For instance, in a combined coal and gas range, with the gas burner located below or even above the bottom of the oven, it is practically impossible to prepare food by'having the utensils restupon the bottom of the granted Sept. 21, 1915.

oven. As an example of such stove, there may be cited my combination coal and gas range disclosed in Patent No. 1,154,038, This particular stove has the gas burner extending through andabove the bottom wall of the oven necessitating the placing of a platformor rest member above the burner for cooking-utensils. It will also be noted that the bottom of the oven is interrupted in' order to pro yide proper ventilation for the burner and 1n consequence of this construction considerable space is lost. As far as I am aware, all combination coal and gas ranges are defective about the oven bottom by either having an auxiliary oven bottom, as a rest member or an oven bottom too hot to accommodate cobking utensils.

Then again, such a stove necessitates a multiplicity of flues and passages, together with controlling valves and dampers, so that the stove may be independently operated with either coal or gas as a fuel. A multiplicity of valve or damper adjustments will soon dishearte'n'or discourage a cook, particularly if in any manner careless, with the result that coal'and gas ranges will be sepemployed for heating the oven is located in use certain flues for either gas proximity to the oven bottom, but not so close thereto as to overheat the bottom and prevent cooking utensils from being placed thereon. In other words, the gas burner is disposed so that the oven bottom will be properly heated and also the walls of the oven with a proper circulation of heat throughout the interior of the oven to insure uniform cooking therein.

Second, a novel damper or valvular mcmber is located in proximity to the gas burner of the stove so that undergas operation the burner may'receive sufficient air for proper combustion and also have its heating units pass under the oven to heat the bottom thereof. This damper or valvular member is adjustable so that the gas heated oven of the stove may be readily converted into a coal heated oven.

Third, the disposal or arrangement of the fines is an important item, so that a minimum flue area will permit of the stove being used either as a coal or gas operated stove of minimum size. In the stove as now constructed and used I am able to use certain flues for either coal or gas operation by simply employing a flue deflector or adjustable member that will permit of products of comm'eans of the stove includes means for proper ventilation of the oven when gas or coal heated.

Fifth, by a member, adjustable at will, I may by a single operation control the use of the stove either by coal or gas as a fuel, that is, by adjusting a single member I regulate the gas when in use, provide for the burner ventilation, provide for the oven ventilation and the gas operation, and place in or coal operation by adjusting a dual deflector. I11- somuch that all of this is accomplished by the single operation on the part of a cook, it

is an extremely easy matter to convert a coal operated-stove into gas. operatedrange, both of which have one oven highly eflicient for cooking purposes. 7 y

The above are by no means all the leading features or characteristics of my invention, but have been simply pointed out to impart some idea as to what I have accomplished by this invention, which will be hereinafter described and then claimed, and reference will now be had to the drawings wherein- Figure 1 is a plan of the combination coal and gas range;

Fig. 2 is a side elevation of: the same, partly broken away and partly in section, showin the "operation of the range with gas and coal;

Fig. 3 is end view of the stove, partly broken away andpartly in section, showing the stove under gas operation;

Fig. 4 is a similar view showing 'a portion of the'stove under coal operation;

"Fig. 5 is a rear elevation (if an air and gas mixing'de'vice adapted to'iform part oi the stove; p i V Fig. G is a side elevation of the same;

Fi'gfi'i is a plan 'of'the stove, partly broken away and in horizontal section; taken on the 1ine-VII VII of Fig. 2; and

Fig. 8 is a similar view taken on the line VIIIVIII of Fig. 2.

' A combination coal and gas range in ac cordance with my invention comprises a base 1 and on this base is a structi'ire having end walls 2 and3, a'rear walls, front wall 5, and 'ato'p wall 6. Thef'ront and rear walls, adjacent the end wall 3'a'nd the top wall 'G' are 'conn'ecte'd'by vertical and'horh zontal partitions 7 and 8, thevertical para tio'n'7 cooperating with the end of the structure in providing a fire place,'including a grate 9, and such other appi'lrten'ances as are necessary for solid fuel.

The rear wall lhas an onset portion, or flue casing 10 provided with a connection 11 fora stove pipe (not shown).

V The space between the horizontal partition 8. and 'thetop wall 6 of the stove structure constitutes a horizontal flue 12 andfthis flue is adapted to 'co'n'imun'icate with the Hue casing 10 by an opening 13 having a conventional forth of damper 14: that maybe ad j u's'ted to regulate the draft of the coal stove Co'l'inectin'g the front and 'r'ear'walls of the stove structure is an oven shell comprising an oven bottom 15 and side walls 16 and 17 The side wall '17 is in spaced relation to the end wall 2-, thereby providing a vertical fine 19 between: the oven bottom 15 and the base 1. The side wall 17 therefore meets the oven bottom 15, as bestfshown. in Fig. 2

partition 7 thereby. providing avertical flue and the upper edge of the side wallil'i" terminates at an inclined-transverse portion 20 of the horizontal partition 8. The side wall 16 is in spaced relation tothe vertical 21 at that side of the oven adjacent the coal stove. The upper edge of the side Wall 16 is curved inwardly in spaced relation to the horizontal partition 8, so that the upper end of the flue 21 may communicate with the upper portion of the oven. The side wall 16, above the oven bottom 15 has a transverse opening 22 and the .lower" end or edge of the side wall 16 terminates in. an angular-1y disposed portion '23 having slots .24 and 25. Joining the 'angularly disposed "portion 23 and the base 1 is a transverse an "'ul'arly disposed brace or partition 26, 'sa'i" partition joining the 'angularly disposed portion 23 between the slots 21 and 25, so that the slot: 25 will communicate with the bottom horizontal fine 19 andth s'lot24 communicating with the atmo's here through medium of openings 27 in the base 1. V 'One end or the bottom 'ho'rizo tal fine 19 is formed by the lower edge of the side wall 16 and by the brace or partition 26, while the "other end of the flue is formed by the end wall 2 ofthe stove structure. In this horizontal flue is a central longitudinal vertical partition 28 extending from the end wall 2 and assisting in supporting the oven bottom 15. The. paftition'2S terminates about centrally of the oven bottom, as best shown in Fig. 8, thereby dividing thebottomhoriing passages ton purposes which willhereinafter appear. y p r V Pivoted in the walls. 17 and 2. andexftending transversely of the verticalflue-18 is a stove bolt'29 having the outer endsthereof provided with a crank .30. .Fixedonthe 1 stove bolt 29, within the verticalfluelS, is a deflector comprising angularly disposed wings 31 and 32, said wings being. atan obtuse angle and adapted tobe adjusted by partial rotation or rocking movement of the stove bolt 29. The wings 31-.and 32 corr'jspond in width tothe vertical-flue 18 and the wing 31 is adapted toengwe anangularly disposed ledge 33 carried-by therear wall 4 of the stove structure an-(ll thisrear wall: has a large opening establishing communication between the vertical line and the flue casing. That edge of thawing 31jcon- 1 tiguousto the end wall2of the stove-strum ture has a shutter- 3 1adapted to closeian opening 35in the end wall 2, when the wing 31 is in engagementwiththe ledge33-L The wing 82 of the deflector isadapted to 12 engage the vertical partition .28. as ''-best' shown in Fig. 4, and that edgeiofthe wing adj acent the: oven side wall17 has shutter V 36- adapted to close an-opening 37 in the 1 loweredgeof the side wall-17.

100 V zontal Title 19 into two parallel 'communicat- Adjustable on the angularly disposed portion 23 of the side wall 16'is a burner damper 38 having a slot 39 adapted to register with the slot 24, and said damper is adapted to close the slot 25. The damper 38 is supported on the angularly disposed portion of the wall 16 by pins 40 the slot 25 in the lower inclined portion of the wall 16, so that flames can be maintained in the flues 21 and 19. The inner end of the burner 43 is closed and the outer end thereof is provided with an air and gas mixing device 44, preferably of that type disclosed in Patent N 0. 1,144,501, granted June 29, 1915, to C. R. Pomaville. This air and gas mixing device is best shown in Figs. 5 and 6 as having a shutter 45 adjustable simultaneously with a gas valve 46 having a jet extending into the air and gas mixing device. The plug or stem 47 of the valve 46 has an arm 48 adapted for adjusting the shutter 45 and fitted over the end of the. plug or stem 47 is a rod 49 parallel with the rear wall 4 and supported by a bracket or hanger 50 car ried by said wall. The rod 49 adjacent the valve 46, has a hook shaped member and loosely connected to said member and the apertured ear 42of the burner damper 38 is a link 52 which permits of the valve 46, the

device 44 and the damper 38 being simultaneously adjusted by rocking or rotating of the rod 49.

At the outer end of "the rod 49 is a crank 53 andloosely connected thereto is an adjustable member'or slide bar 54 parallel with the end wall 2 of the stove structure."

The adjustable member 54 is supported in a strap or bracket55 connected to the wall 2 and said member has a slotted portion 56 to receive the crank 30 of the flue deflector. A handle 57 on the outer end of the member 554 permits of said member being shifted so thatthe cranks 30 and 53 may be moved. An enlarged portion 58 on the lower edge of the member 54 is adapted to have one of its ends abut either side of the strap 54 and thus determine the position of the member 54 for difl'erent adjustments.

The valve 46 is supplied with gas or other fuel by a pipe that extends longitudinally back of the stove structure and then upwardly by a pipe 59 to a T connection 60 which accommodates a gas or'fuel supply pipe 61 and a pipe 62 that extends forwardly and in front of a' grid casing or compartment 63 in the top of the stove structure, as

extending lnto angularly disposed slots adjacent the ends of the best shown in Figs. 1 and 2. The grid casing 63 has grids 64 and contains burners 65 supplied with gas or fuel from the pipe 62. Ordinary gas and air mixing devices 66 and valves 67 control and regulate the operation of the burners 65, which are preferably of that type disclosed in my Patent No. 1,256,243, granted Feb. 12, 1918.

When it is desiredto use gas as a fuel for cooking purposes, the oven door is opened, the adjustable member 54 pulled outwardly to the position shown in Fig. 3, and then the gas ignited at the burner 43. This may be accomplished as the burner 43 is adjacent the opening 22 in the oven wall 16. The oven door may be closed and to bake or otherwise cook anything in the oven, it may be safely placed upon the oven bottom 15 or upon grids or frames adapted to be. supported by the walls 16 and 17. During the operation of the even, under gas, the damper 38 is set, as shown in Fig. 2, so that the lower part of the flue 21 receives air and this air, together with the products ofcombustion can circulateabout the oven, as indicated by arrows in Fig. 2. The heated air will also pass through the opening 37 in the oven wall 17 and into the horizontal bottom flue 19 to the Vertical flue 18 from where it passes into the flue casingflO and the stovepipe'connected thereto.

When the adjustable member 54 was pulled outwardly five adjustments were simultaneously made, namely, the gas was turned on at the valve 46, the burner damper 38 was adjusted, also the shutter 45 of the air and gas mixing device 44, the flue deflector was shifted so that the opening 35 wasuncovered, also the opening 37 of the oven wall 17. With the opening 35 uncovered, air may enter the opening and induce a draft through the vertical flue 18 toward the casing 10, and by reference to Fig. 3, it will be noted that the flue deflector has the ends of its wings in spaced relation to the front and rear walls'of the stove structure and when in such position constitutes prac tically a horizontally bafile in the lower part of the flue 18, causing the heated air and products of combustion to travel toward the ends of the wings 31 and 32 in order to escape into the flue casing. This insures thorough heating of the oven wall 17 and serves to sufficiently retard the heated air and products of combustion so that all of the walls of the oven, particularly the oven bottom will be heated.

During the operation of the stovewith gas, the gas may be regulated by slightly shifting the adjustable member 54 and there is suflicient play at the link 52 to permit of. a slight rocking or rotative movement of the rod 49 without affecting the position of the damper 38. When the gas is regulated, for instance lowered, of course the flue deflector is shifted, but the openin 37 is still u'ucovered while the area of the opening 35; is slightly reduced, consequently the draft not so strong toward the flue casing. "Th1s 1 has been Worked out to a nicety so that there be desired to use the same. With the -mem- 15 her 5% pushed inwardly, the shutter 3'6 of the flue deflector cl'osw the opening 37 and the shutter 36L closes the opening 35-. The wing 31 now engages the ledge '33 and the wing 32 engagesthe partition '28 in the horizontal bottom flue 19. The member 38 has closed the slot 24 and also'the slot 25, and with the damper '14 closed, the products of combustion from the coal fire must pass over the top of the oven through the flue "12, and'then downwnrdlv in the verticalfiue 18 as sh'o'wn by arrows in Fig. Theproducts or combustion will impinge against the wing 31 of the flue "deflector and 'enterthe :lront passige in the horizontal bottom line From this passage the products of combustion. travel around theend of the partition into the rear passage of the flue arid upwardly in the vertical fine 18, beneath the wing 31 into the flue'casing 10. In this instance, the flue 21 within the'oven is placed out oif-co-mmission, as the oven is sealed against any of the products of. combustion entering the SaiIre,b1lt all oif 'th'e oven walls will be thoroughly heated before the escape of the products. of combustion.

From the foregoing it will be observed thafitlre five adjustments made through the mediun-rof the member 5a are very essential in order that a coal stove can "be converted into a gas range, and that the problem has been solved by the location of the burner 43 and the combined flue deflector and battle, as otherwise it would be practically impossible to properly heat the oven bottom by gas or coal; g V

In operation with eithengas or coal, the burners may be employed for cooking purposes and the damper 14 may be adjust-ed to increase or decrease the 'draft'for coal.

What I claim is 1. The combination of an oven having conimunicating flues adapted to communicate with said even and difierent sources of heat, means in one of said fines serving as a baflle when wholly therein and adapted to be adjusted to extend into another {line and cause heat 'from one source-to travel in saidflues in a difl erent' Way from the heat of the other source, and means reciprocab'le neoaeea at the end of the oven for actuating the claim 2 in which adjustment of said member controls the operation of the stove by gas.

a. A stove structure as characterized in claim 2, in whichthe achusta ble member is actuated by a "crank and a slide bar at'the end of the stove structure.

5.1Tn a coihbiniationcoal and gas range, a stove structure having an oven with flues thereabout, a fireplace in said structure communicating with said lines, a gas burner adaptedto communicate with said oven and said flues, a valve controlling the operation of said burner, an air and gas'mixen for said burner, a 'damperadapted to admitair about said burner, a deflector in animal flue or said 7 ran 'e and a member 'reci roca'ble at one end w-all'of said range adapted to simultane- 7 ously adjust said valve, mixer, damper and deflector. i

stove structurehaving an oven withffi ues thereabout, a fireplace invsaid stru ture communicating with said flues, a; gas burner adapted to communicate with said even and;

v n-1 00 6. In a combination coal and gas range, a 1

said flues, a valve controlling the operation 7 of -said burner, an air and gas mixer for said'burner, a damper adapted to admit air about said burner and controlits communication w th one of sa1dfli1es,.a deflectorin one of saidflue's, shutters carrled'bysaid deflector controlling communication between said oven oneof said .ilues and thesame fiue and the atmosphere, and means adapted to simultaneously adjust said valve,

mixer, damper and deflector.

7. 1h a stove structure, a walled oven 'with flues thereabout. said oven having a slotted wall-projectingfrom the bottom -thereof at one end of said oven and adapted to separatetwo of said lines, a damper 'sli-daiole on the slotted portion of said wall, a stationary burner in the" plane of the oven bottom ad-' jacent said damper adapted to direct flames into the'said twofflues when said damperis in an open. position, a valve controlli the operationofsaid burner, and means a aptedfor simultaneously *operatingsaid valve and said damper.

8. A stove structure as characterized in claim 7 in which said means includes a loose link connection so that said valve may be regulated between extreme open and shut positions without afl'ecting said damper.

stove comprising a base; end walls; a front wall; a rear wall; a top wall; vertical and horizontal partitions cooperating with an end wall, front, rear and top wall in providing a coal fire place and a flue therefor; an oven bottom between said front and rear walls cooperating with said base in forming a bottom flue; a longitudinal partition in said bottom flue extending from one of the end walls of said stove and assisting in supporting the oven bottom; side oven walls between said front and rear Walls with one of said side walls extending to said base and both of said side walls cooperating Copies of this patent may be obtained for five cents each, by addressing the with aforementioned Walls and partitions in providing vertical flues; a gas burner in one of said vertical flues; a valve controlling the operation of said burner; a deflector in the other of said vertical flues, and means adapted for simultaneously adjusting said valve and deflector,

10. A stove structure as characterized in claim 9, in which a slidable damper is located below said burner for rendering one of said vertical flues inactive during the use .of said fire place.

In testimony whereof I afiix my signature in the presence of two witnesses.

HENRY O. MAUL. Witnesses:

APHUS POMAVILLE, WALTER E. THoMPsoN.

Commissioner of Ilatentr;

Washington, D. G. 

